Page 399 - Praxair - Specialty Gases and Equipment Reference Guide

Gas Detection Systems

Gas Sensor/Transmitter

S2 Model
The S2 series gas sensor/transmitters are highly reliable The plug-in design allows quick replacement in the field
and very cost effective for the detection of common gas with no tools required. Toxic sensors are designed for use
hazards. The S2 series are available for LEL, H Specific in Class I, Div. 2 hazardous locations. Sensors available
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(LEL, and ppm), Oxygen, H S, CO, and for a variety of for NH , SO 2 , PH 3 , AsH 3 , and HCN.
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toxic gases. The transmitters for LEL, H Specific, Oxygen, The S2 transmitters can be used either indoors or outdoors.
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H S, CO 2 , and Carbon Monoxide are explosion-proof with The flame arrestors for the explosion-proof versions utilize
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flame arrestors, and approved for use in hazardous areas a patented coating which make them water repellent.
(Class l, Groups B, C, D). An optional non-explosion proof Splash guards are also available for use in very wet
version is available for oxygen, H S, CO, and CO 2 in non- environments. An optional stainless steel junction box is
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hazardous atmospheres. LEL sensors are available using available for corrosive environments.
catalytic bead and infrared technologies.
All of the S2 transmitters are designed to interface with
The toxic sensors are electrochemical type plug-in sensors, Beacon controllers, or with PLC/DCS systems.
which provide high specificity, fast response, and long life.

Features
n Available gases include – LEL, H 2 S, CO, PPM H 2 , and CO 2
n Toxic gases include – NH 3 , SO 2 , HCN, and more
n Infrared sensor for combustibles and CO 2 Explosion Proof
n Hydrogen-specific now available
n Patented water repellent sensor coating O 2 / CO / H 2 S
n 4-20 mA output
n Explosion proof construction
n Optional stainless steel junction box

Explosion Proof
LEL

NH3 Sensor

Section E – Gas Handling Equipment

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